Water-tube cleaner



(No Model.)

G. S. DEAN. WATER TUBE CLEANER.

Patented Apr. 13, 1897.

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UNITED STATES PATENT OFFICE.

CYRUS S. DEAN, OF FORT ERIE, CANADA, ASSIGNOR TO WILLIAM B. PIERCE,

oF BUFFALO,

NEW YORK.

SPECIFICATION forming part of Letters Patent No. 580,776, dated April13, 1897.

Application filed November 13, 1896. Serial No. 611,950. (No model.)

To all whom tm-ay concern:

Be it known that I, CYRUS S. DEAN, a subject of the Queen of GreatBritain, residing at Fort Erie, in the county of Welland and Province ofOntario, Canada, have invented certain new and useful Improvements inWater-Tube Cleaners, of which the following is a specilication,reference being had therein to the accompanying drawings.

This invention relates to machines or tools for cleaning the water-tubesof steam or other boilers of incrustation,scale, and other foreignmatter accumulating thereon, and is design ed as an improvement on thecleaner for which on or about September 9, 1896, I iled an applicationin the United States Pat-ent Oflice for Letters Patent, Serial No.605,238.

The improvement relates more particularly to mechanism for operating thecutter or scale -loosening device and in the special construction andcombination of the parts, whi ch hereinafter will be more fullydescribed and illustrated and nally set forth in the subjoined claims.

In the drawings, vFigure 1 is a detail view of a cleaner constructed inaccordance with this invention, parts being broken away and thewater-tube and shell being shown in section. Fig. 2 is a section on theline X X of Fig. 1,.looking in the direction of the arrow. Fig. 3 is adetail view showing the scaleloosening device or cutter in duplicate anda single piston. about on the line Y Y of Fig. 3, looking to the left,as indicated by the arrow.

Corresponding and like parts are designated in the following descriptionand in the views ofthe accompanying drawings by the samereference-characters.

The water-tube 1 is an element of a steam or other boiler of the tubulartype,- and is illustrated to show the application of the invention. Theshell 2 is adapted to be connected at one end with a hose or other pipeleading from the steam-generator in the ordinary manner, so as tosupplya motive medium to the shell for operating the scale-looseningdevice, and the opposite end of the shell is provided with a chamberedhead 3, within which is mounted one or more pistons 4. As shown in Figs.1 and 2, the head is formed Fig. 4 is a detail section with parallelchambers 5, each being supplied with a piston, and, as shown i`n Figs. 3

and 4f, the head has a single chamber 6, in which reciprocates a pistonLl. A port 7 ex tends parallel with each chamber 5, and communicatestherewith at its rear end by a transverse port S, and has a longitudinalport 9, extending through a side of the head to receive the steam orother motive medium for positively driving the piston. Each piston 4 tssnugly within its chamber 5 and has a recess 10, in which is fitted arocking bearing 11, the latter being apertured to receive an arm 12 of avibrating lever 13, fulcrumed to the head 3. This lever 13 is providedat its outer end with a scale-loosening device or cutter 14, which maybe of any desired form,

according to the nature of the work to be performed.

The side of the head through which the port 9 extends is flattened andforms a seat fora slide-valve 15, which latter controls the admissionand the exhausting of the steam from the chamber. This slide-valve hasinner lugs 16, between which operates a pin 17, projecting laterallyfrom an extension of the leverl, a slot 18 being formedin the valveseatfor the pin 17 to operate in and providing an escape for the spent orexhaust steam.

The steam or motive medium for vibrating the scale-loosening device isadmitted into the shell 2 in' the usual way and, passing through a port9, enters a chamber 5 and drives the piston therein forwardly. At thesame time the other piston is moved to the rear or to a startingposition by reason of the arm 12 engaging therewith, the air in thechamber in the rear of the piston escaping through the port 8 and intothe slide-valve by way of the ports 7 and 9, thence into the slot 18,and out through the head either by way of the opening in which the lever13 vibrates or out through a nozzle 19. After the piston has beenimpelled to the limit of its forward stroke the scale-loosening devicewill have struck the side of the tube 1 and rebounded sufficientlyr toshift the slide-valve, so as to close the port 9 previously opened andopen the port previously closed, thereby admitting the steam in the rearof the second piston, when the operation thus described will be IOOposite direction.

the pin 1-'7 and the lugs 16 to admit of a rebound of the cutter orscale-loosening device prior to shifting the valve.

As shown in Fig-3, the scale-loosening device 2O is duplicated and ispivoted tothe head 3 near the side thereof, and the inner end of each isadapted to be struck by an extension 2l of piston 4, whereby bothcutters are operated simultaneously. Ports 22 and 23 communicate withthe interior of the chamber 6, the port 22 being at the ends thereof andthe port 23 intermediate of the ends, and atappet 24 is located in theport 23 and has its ends engaging with the piston and slide-valve,whereby the latter is positively actuated by means of the piston, thelatter being groov'ed intermediate of its ends to receive the inner endsof the tappet 24 and provide a passage for the escape of theexhaust-steam. A duct 25 is formed in a side of the head andcommunicates with the space formed by the an-v is moved so as to uncoverthe port by the ref bound of the scale-loosening mechanism and by thecushion formed at the end of the chamber, thereby permitting the steamto enter in the rear of the piston the instant the valve is shifted, sothat the piston may be driven positively to the limit of its stroke inthe op- Inasmuch as the work is performed at the forward stroke of thepiston, the steam acts on the full area of the piston at its rear endand only on a portion of the front end because of the extension 21.

A detailed description of the. operation, in view of the foregoing, isnot deemed necessary, as the same is obvious.

A tube-cleaner comprising a chambered` head, a piston, a scale-loosener,a slide-valve, and an intermediate connection between the slide-valveand piston related in the manner set forth, whereby a limited movementbetween the piston and valve is had and whereby the valve and pistonmutually coperate tion filed by me September 9, 1896, Serial No.

605,238. A piston having a rocking bearing and an arm carrying ascale-loosener and working loosely through the rocking bearing isclaimed by me in an application for a like invention filed of even dat-eherewith, Serial No. 611,949.

Having thus described my invention, what i I claim, and desire to secureby Letters Patent, is-

1.111 a tube-cleaner, the combination of a longitudinally chamberedhead, a piston mounted to reciprocate longitudinally of the said head, ascale-loosener pivoted to the head and adapted to operate in a directionabout at right angles to the movement of the piston and actuatedthereby, a slide-valve at one side of the head, and actuating mechanismfor the movable parts, substantially as shown and described.

2. In a tube-cleaner, the combination of a head having parallelchambers, pistons located in the chambers, a scale-loosening d'evicehaving positive connection with each piston, and a slide-Valve operatedby means of the scale-loosener for controllingy the admission andexhausting of the steam from the chambers, substantially as specified.

3. In a tube-cleaner, the combination of a head havin-g parallelchambers, a scale-loosening device pivotally supported intermediate ofthe chambers and having oppositelyextending arms, pistons located in thechambers and having the said arms engaging therewith, and a slide-valvefor controlling the admission and exhausting of the motive medium fromthe said chambers, substantially as and for the purpose specified.

4. A tube-cleaner comprising a head having parallel chambers, pistonslocated in the chambers, a slide-valve for controlling the admission andthe exhausting of the motive medium from the chambers, and ascale-loosening device pivotally connected with the headintermediate ofthe chambers, and having oppositely-extendin g armsto engage with thepistons and a rear extension provided with a lateral projection4engaging with the said slide-valve, substantially in the manner setforth for the purpose specified.

In testimony whereof I affix my signature in the presence of twowitnesses. f

GAY-RUS S. DEAN.

IOO

